Senior Software Engineer, Backend

🕒 September 9

🇨🇷 Costa Rica – Remote

💵 ₡1.5M - ₡2.5M / month

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 11%

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SimSpace

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2015

💼 Consulting

🎖️ Defense

🔒 Cybersecurity

🔥 Funding within the last year

💰 $39M Venture Round - SimSpace on 2025-10

Consulting • Defense • Cybersecurity

SimSpace is a cybersecurity company that provides a realistic, intelligent cyber range platform for training, testing, and validating security teams, tools, and AI agents. Its platform enables live-fire exercises, threat emulation (full kill-chain and atomic), validation of controls and agentic workflows, and disaster recovery and compliance testing; it is used by enterprises and government customers to build cyber readiness and resilience. Founded by experts from U. S. Cyber Command and MIT Lincoln Laboratory, SimSpace focuses on upskilling individuals, strengthening teams, and evaluating AI-driven defenses in realistic, production-like simulations.

📋 Description

• Build core endpoint capabilities and distributed orchestration services for realistic offensive security and simulated user personas across cyber ranges • Design, build, and operate production software in Go, Python, and Kotlin for attack and user emulation frameworks • Develop deep operating-system integrations on Windows and Linux using native OS APIs, session management, process execution, and system facilities • Improve reliability, security, testability, and observability across message-driven architectures operating at scale • Solve high-fidelity emulation problems involving desktop/web automation, privilege boundaries, input simulation, and realistic user timing • Collaborate with backend, security, and AI engineering teams to define reusable primitives and APIs • Conduct code and design reviews, mentor team members, and elevate platform-level engineering practices • Build familiarity with the Go endpoint agent and debug cross-platform OS behaviors within 30 days • Lead delivery of a new endpoint emulation capability or native system integration within 60 days • Drive architectural improvements across distributed messaging and agent subsystems within 90 days

🎯 Requirements

• 6+ years of hands-on software engineering experience delivering and operating production software • Deep practical experience with Windows or Linux systems development below application-level abstractions, including native APIs, process/session management, eBPF, IPC, or security contexts • Strong proficiency in Go, or demonstrated expertise in another systems language with ability to become productive in Go quickly • Experience with JVM languages such as Kotlin or Java • Experience with message-driven, asynchronous architectures • Ability to reason about complex OS failure modes, fidelity-versus-complexity trade-offs, and distributed system stability • Experience building production endpoint, monitoring, remote management, or EDR/security agents preferred • Experience with desktop/browser automation, accessibility APIs, or computer vision preferred • Familiarity with hypervisors, VDI, endpoint security telemetry, adversary emulation, or AI-agent tool integration preferred • Ability to work primarily within U.S. business hours when required • Currently authorized to work in Costa Rica • Ability to conduct business entirely in English

🏖️ Benefits

• Annual bonuses tied to company performance and individual contributions • Private medical, dental, vision, and life benefits • Company-paid counseling, coaching, and resources for you and your family through Spring Health • Paid parental leave plans • Equity stock options at hire, with annual performance-based grants • LinkedIn Learning membership • Monthly reimbursements for meaningful connections with teammates through the SocialSpace Community